#pragma once
#include <iostream>
#include <string>
#include <queue>
#include <pthread.h>

const int defaultcap = 5;

template <class T>
class BlockQueue
{
private:
    bool IsFull() { return _q.size() >= _cap; }
    bool IsEmpty() { return _q.empty(); }
public:
    BlockQueue(int cap = defaultcap)
        :_cap(cap), _psleep_num(0), _csleep_num(0)
    {
        pthread_mutex_init(&_mutex, nullptr);
        pthread_cond_init(&_full_cond, nullptr);
        pthread_cond_init(&_empty_cond, nullptr);
    }

    void push(const T& data)
    {
        pthread_mutex_lock(&_mutex);

        while(IsFull())
        {
            _psleep_num++;
            pthread_cond_wait(&_full_cond, &_mutex);
            _psleep_num--;
            std::cout << "生产者进入休眠" << std::endl;
        }

        _q.push(data);

        if(_csleep_num > 0)
        {
            pthread_cond_signal(&_empty_cond);
            _csleep_num--;
            std::cout << "唤醒消费者" << std::endl;
        }

        pthread_mutex_unlock(&_mutex);

    }

    T pop()
    {
        pthread_mutex_lock(&_mutex);

        while(IsEmpty())
        {
            _csleep_num++;
            pthread_cond_wait(&_empty_cond, &_mutex);
            std::cout << "消费者进入休眠" << std::endl;
            _csleep_num--;
        }

        T data = _q.front();

        if(_psleep_num > 0)
        {
            pthread_cond_signal(&_full_cond);
            _psleep_num--;
            std::cout << "唤醒生产者" << std::endl;
        }

        pthread_mutex_unlock(&_mutex);

        return data;

    }

    ~BlockQueue()
    {
        pthread_mutex_destroy(&_mutex);
        pthread_cond_destroy(&_full_cond);
        pthread_cond_destroy(&_empty_cond);
    }
private:
    int _cap;
    std::queue<T> _q;

    pthread_mutex_t _mutex;
    pthread_cond_t _full_cond;
    pthread_cond_t _empty_cond;

    int _psleep_num;
    int _csleep_num;
};